Protective circuit for protection against over-voltage for a CAN bus transceiver
US7218497B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 9, 2003 |
| Grant date | May 15, 2007 |
| Priority date | — |
| Expiry date | Apr 3, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0272
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The invention relates to a protective circuit for a CAN-bus transceiver that is designed voltagewise for a first vehicle electric system, said transceiver being operated in a second vehicle electric system with a voltage that is several times higher than the voltage of the first vehicle electric system, comprising two diodes arranged between the bus terminal leads of the transceivers whose cathodes are connected to one another and to which a predetermined potential is applied, in addition to a limiting resistor mounted between each of the bus terminal leads of the transceiver and the bus line assigned thereto and two current mirror circuits for maintaining the require voltage level in the bus lines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.